12a+28=40

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Solution for 12a+28=40 equation: 



12a+28=40

We move all terms to the left:

12a+28-(40)=0

We add all the numbers together, and all the variables

12a-12=0

We move all terms containing a to the left, all other terms to the right

12a=12

a=12/12

a=1

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